Features Versatile Control Options: Easily connect to various hosts like computers and PLCs for seamless command execution and display control Hassle-Free Operation: Automatically recognizes ASCII text and RTU protocols, eliminating the need for user configurations and simplifying setup Simple Installation Process: Designed for easy embedding, this panel module requires only a square hole with no screws needed, making installation quick and efficient High Performance Efficiency: Features a robust switching power supply circuit with a wide voltage range, ensuring reliable operation for extended periods Enhanced Circuit Protection: Built with an industrial-grade RS485 chip that offers surge, static, and overcurrent protection, safeguarding your device against electrical issues Features: 1、5PCS IN 1 SET: Including 5pcs array keyboard module, with 4 keypad design, has strong practicability. 2、EXCELLENT MATERIAL: Using excellent electronic components, with fine craftsmanship, which has good durability. 3、EASY TO INSTALL: These key modules have standard sizes with mounting holes and pins for easy installation. 4、WIDE APPLICATION: Suitable for car modification, motor control, light bulbs, LED light strings, micro pumps, solenoid valves, etc. 5、COMPACT SIZE: The array switch module has a compact structure, is easy to install and does not take up space. Specification: Item Type: Keypad Module Material: PCB Keypad: 4 Keypad Purpose: Scan Button Package List: 5 x Keypad Modules Package List 5 x Keypad Modules